3D Controller

3Dconnexion SpaceNavigator is a joy-stick control device for use in Second Life and newer 3D Graphic programs.  It has 6 axis of movement in a small palm size device.  I have been lucky in owning a SpaceNavigator and find it makes it really easy to Walk, Fly and Look up & down in SL by moving just my wrist.   Price is $99 ($60 on Sale) for the PE version.